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- Author:
- Liu, Xingchen; Tang, Ning; Fang, Chi; Wan, Caihua; Zhang, Shixiong; Zhang, Xiaoyue; Guan, Hongming; Zhang, Yunfan; Qian, Xuan; Ji, Yang; Ge, Weikun; Han, Xiufeng; Shen, Bo
- Source:
- RSC advances 2020 v.10 no.21 pp. 12547-12553
- ISSN:
- 2046-2069
- Subject:
- magnesium oxide, etc ; cobalt; injectors; temperature; Show all 4 Subjects
- Abstract:
- ... Spin relaxation, affected by interfacial effects, is a critical process for electrical spin injection and transport in semiconductor-based spintronics. In this work, the electrical spin injection into n-GaN via n-GaN/MgO/Co tunnel barrier was realized, and the interface-related spin relaxation was investigated by both electrical Hanle effect measurement and time-resolved Kerr rotation (TRKR) spect ...
- DOI:
- 10.1039/d0ra00464b
-
http://dx.doi.org/10.1039/d0ra00464b
- Author:
- Onochie, Kenechi Kurtis; Balkis, Ayse Pekrioglu
- Source:
- Journal of cleaner production 2021 v.279 pp. 123600
- ISSN:
- 0959-6526
- Subject:
- magnesium oxide, etc ; Fourier transform infrared spectroscopy; X-ray diffraction; chemical composition; clay; computer software; computer techniques; construction materials; cracking; drying; gypsum; mechanical properties; polypropylenes; scanning electron microscopes; shrinkage; soil; wastes; Cyprus; Show all 18 Subjects
- Abstract:
- ... Alker is a technology which utilizes the use of 8–10% clay in gypsum stabilized earthen materials in earthen construction. Earthen construction has gained prominence in recent times as a result of its ease in construction, environmental friendliness and availability meeting the housing needs prevalent in most countries with a growing population including North Cyprus. Wastes such as gypsum and pol ...
- DOI:
- 10.1016/j.jclepro.2020.123600
-
https://dx.doi.org/10.1016/j.jclepro.2020.123600
- Author:
- Sun, Xun; Guo, Rui-Fen; Shaga, Alateng; Hu, Zhi-Jie; Shen, Ping; Zhang, Zhi-Qiang; Jiang, Qi-Chuan
- Source:
- Carbon 2020 v.162 pp. 382-391
- ISSN:
- 0008-6223
- Subject:
- magnesium oxide, etc ; alloys; carbon nanotubes; magnesium; pressing; silica; Show all 6 Subjects
- Abstract:
- ... A nacre-like magnesium matrix composite with high carbon nanotube (CNT) contents (up to 4.40 wt%) was successfully prepared under the combined effects of bidirectional freeze casting, pressureless infiltration, and hot pressing. The bidirectional freeze casting was carried out to fabricate large-scale parallelly layered CNT scaffolds. The spontaneous infiltration of an AZ91 magnesium alloy was ach ...
- DOI:
- 10.1016/j.carbon.2020.02.072
-
https://dx.doi.org/10.1016/j.carbon.2020.02.072
- Author:
- Ming, Hongwei; Zhu, Chen; Qin, Xiaoying; Zhang, Jian; Li, Di; Zhang, Baoli; Chen, Tao; Li, Jimin; Lou, Xunuo; Xin, Hongxin
- Source:
- ACS applied materials & interfaces 2020 v.12 no.17 pp. 19693-19700
- ISSN:
- 1944-8252
- Subject:
- magnesium oxide, etc ; iron; nanoparticles; selenides; thermal conductivity; tin; Show all 6 Subjects
- Abstract:
- ... As an ecofriendly thermoelectric material with intrinsic low thermal conductivity, ternary diamond-like Cu₂SnSe₃ (CSS) has attracted much attention. Nevertheless, its figure of merit, ZT, is limited by its small thermopower (S) and power factor (PF). Here, we show that an increase in thermopower by 63% and a carrier-mobility rise of 81% at 300 K can be simultaneously achieved through 5% substituti ...
- DOI:
- 10.1021/acsami.0c04298
-
http://dx.doi.org/10.1021/acsami.0c04298
- Author:
- Savio, Letizia; Smerieri, Marco; Vattuone, Luca; Tosoni, Sergio; Pacchioni, Gianfranco; Rocca, Mario
- Source:
- Journal of physical chemistry 2020 v.124 no.16 pp. 8834-8842
- ISSN:
- 1932-7455
- Subject:
- magnesium oxide, etc ; oxygen; physical chemistry; scanning tunneling microscopy; silver; Show all 5 Subjects
- Abstract:
- ... When imaged by scanning tunneling microscopy (STM) at constant current under nontopographic conditions, nanosized MgO islands grown on Ag(100) may show a fractal dark internal structure and/or appear embedded in the surface. On the contrary, when imaged under topographic conditions, the same islands appear as nearly flat plateaus. Islands showing different contrast and a different contrast depende ...
- DOI:
- 10.1021/acs.jpcc.0c01248
-
http://dx.doi.org/10.1021/acs.jpcc.0c01248
- Author:
- Hay, Rotana; Celik, Kemal
- Source:
- Journal of cleaner production 2020 v.248 pp. 119282
- ISSN:
- 0959-6526
- Subject:
- magnesium oxide, etc ; carbon dioxide; carbon sequestration; carbonates; carbonation; cement; magnesium; Show all 7 Subjects
- Abstract:
- ... Reactive magnesium oxide cement (RMC) has the potential to become a sustainable alternative to ordinary Portland cement (OPC). In this study, an approach utilizing supercritical CO₂ (scCO₂) was investigated to accelerate carbonation of an RMC-based composite and to overcome its long carbonation process under the natural environment. It was found that scCO₂ led to an extremely rapid strength gain o ...
- DOI:
- 10.1016/j.jclepro.2019.119282
-
https://dx.doi.org/10.1016/j.jclepro.2019.119282
- Author:
- Zhang, Runxiao; Panesar, Daman K.
- Source:
- Journal of cleaner production 2020 v.271 pp. 122021
- ISSN:
- 0959-6526
- Subject:
- magnesium oxide, etc ; carbon dioxide; carbonation; cement; chemical composition; compression strength; mechanical properties; microstructure; porosity; Show all 9 Subjects
- Abstract:
- ... A sustainable binder system with a capacity to mineralize CO₂ can be formulated by reactive MgO and Portland cement (PC). This research studies the properties of mortar specimens made with carbonated MgO-PC systems with a MgO substitution range of 0%–100% in order to evaluate and compare the compressive strength, chemical composition and pore structure. Key results indicate that the carbonation fr ...
- DOI:
- 10.1016/j.jclepro.2020.122021
-
https://dx.doi.org/10.1016/j.jclepro.2020.122021
- Author:
- Yan, J.; Pan, Z.H.; Zhao, C.Y.
- Source:
- Applied energy 2020 v.275 pp. 115356
- ISSN:
- 0306-2619
- Subject:
- magnesium oxide, etc ; chemical reactions; energy density; heat exchangers; heat transfer; magnesium hydroxide; temperature; thermal energy; Show all 8 Subjects
- Abstract:
- ... Thermochemical heat storage uses a reversible chemical reaction to store thermal energy. This thermal energy storage method has high energy density and allows long-term thermal energy storage. MgO/Mg(OH)₂ is a promising reversible reaction for thermochemical heat storage systems. The performance of this reversible reaction inside a reactor plays a key role in its practical applications. The direct ...
- DOI:
- 10.1016/j.apenergy.2020.115356
-
https://dx.doi.org/10.1016/j.apenergy.2020.115356
- Author:
- Fu, Yafeng; Yang, Bin; Ma, Yingqiang; Sun, Qianyu; Yao, Jin; Fu, Wenbiao; Yin, Wanzhong
- Source:
- Powder technology 2020 v.376 pp. 486-495
- ISSN:
- 0032-5910
- Subject:
- magnesium oxide, etc ; artificial intelligence; kinetics; magnesite; models; particle size; prediction; silica; Show all 8 Subjects
- Abstract:
- ... This research focused on the effect of particle size and flotation time on magnesite flotation, and the flotation performance of various size fractions were predicted by a machine learning (ML) method. Four kinetic models were used to fit the recovery of MgO and SiO₂ in various size fractions of magnesite flotation. The results demonstrated that the flotation of magnesite exhibits good agreement w ...
- DOI:
- 10.1016/j.powtec.2020.08.054
-
https://dx.doi.org/10.1016/j.powtec.2020.08.054
- Author:
- Steau, Edward; Mahendran, Mahen; Poologanathan, Keerthan
- Source:
- Fire safety journal 2020 v.116 pp. 103153
- ISSN:
- 0379-7112
- Subject:
- magnesium oxide, etc ; calcium silicate; fire resistance; fire testing; gypsum; gypsum board; heat transfer; insulating materials; steel; Show all 9 Subjects
- Abstract:
- ... Cold-formed Light gauge Steel Frame (LSF) floor-ceiling systems are commonly made with non-combustible fire protective membrane to protect the steel floor joists in fire. Thermal improvements to the fire protective membrane delay the heat transfer to structural elements and provide enhanced fire resistance level. Hence, this study addresses the thermal performance of different fire resistant board ...
- DOI:
- 10.1016/j.firesaf.2020.103153
-
https://dx.doi.org/10.1016/j.firesaf.2020.103153
- Author:
- Hilo, Ali Kareem; Talib, Abd Rahim Abu; Iborra, Antonio Acosta; Sultan, Mohammed Thariq Hameed; Hamid, Mohd Faisal Abdul
- Source:
- Powder technology 2020 v.372 pp. 497-505
- ISSN:
- 0032-5910
- Subject:
- magnesium oxide, etc ; Reynolds number; convection; cupric oxide; ethylene glycol; friction; nanofluids; nanoparticles; Show all 8 Subjects
- Abstract:
- ... The forced convective heat transfer and friction factor of nanofluids flow over a backward-facing step (BFS) in a channel with the base wall dissipating a uniform heat flux are experimentally investigated in this paper. Nanoparticles such as CuO and MgO dispersed in pure ethylene glycol (EG) with average diameters of 40 nm, and volume concentrations of 0, 1, 3, and 5% are considered as the working ...
- DOI:
- 10.1016/j.powtec.2020.06.013
-
https://dx.doi.org/10.1016/j.powtec.2020.06.013
- Author:
- Luo, Zeshunji; Lin, Xiaoxia; Tang, Licheng; Feng, Yong; Gui, Yufan; Zhu, Jiajun; Yang, Wulin; Li, Deyi; Zhou, Lingping; Fu, Licai
- Source:
- ACS applied materials & interfaces 2020 v.12 no.31 pp. 34755-34762
- ISSN:
- 1944-8252
- Subject:
- magnesium oxide, etc ; adsorption; batteries; cathodes; electrolytes; energy conversion; lithium; nanosheets; redox reactions; specific energy; temperature; vapors; Show all 12 Subjects
- Abstract:
- ... Two-dimensional (2D) nanomaterials possessing a unique sheet structure, compared to correlative bulk materials, exhibit excellent properties, especially in the energy storage and energy conversion field. In this case, NiCl₂ nanosheets with thicknesses of 2–8 nm are first prepared by a simple chemical vapor deposition method. For the Li–B/LiF–LiCl–LiBr/NiCl₂ thermal battery, the specific energy of ...
- DOI:
- 10.1021/acsami.0c05751
-
http://dx.doi.org/10.1021/acsami.0c05751
- Author:
- Yurpalov, Vyacheslav L.; Stepanova, Liudmila N.; Drozdov, Vladimir A.; Belskaya, Olga B.
- Source:
- Colloids and surfaces 2020 v.596 pp. 124733
- ISSN:
- 0927-7757
- Subject:
- magnesium oxide, etc ; adsorption; aluminum; anions; carbon dioxide; electron paramagnetic resonance spectroscopy; hexane; magnesium; solvents; toluene; Show all 10 Subjects
- Abstract:
- ... In current work the features of 1,3,5-trinitrobenzene (TNB) transformation into paramagnetic products on the surface of aluminum/magnesium oxides calcined at 550°C, as well as MgAl double oxides, were investigated by EPR spectroscopy. It was shown that the increase of basicity (i.e. MgO content) leads to the increase in the concentration of formed radical anions, wherein the presence of acidic sit ...
- DOI:
- 10.1016/j.colsurfa.2020.124733
-
https://dx.doi.org/10.1016/j.colsurfa.2020.124733
- Author:
- Nityashree, N.; Manohara, G. V.; Maroto-Valer, M. Mercedes; Garcia, S.
- Source:
- ACS applied materials & interfaces 2020 v.12 no.30 pp. 33765-33774
- ISSN:
- 1944-8252
- Subject:
- magnesium oxide, etc ; atmospheric pressure; calcium oxide; carbon; carbon dioxide; carbonation; limestone; sorbents; Show all 8 Subjects
- Abstract:
- ... Developing novel sorbents with maximum carbonation efficiency and good cycling stability for CO₂ capture is a promising route to sequester anthropogenic CO₂. In this work, we have employed a green synthesis method to synthesize CaO-based sorbents suitably stabilized by MgO and supported by in situ generated carbon under inert atmosphere. The varied amounts (10–30 wt %) of MgO were used to stabiliz ...
- DOI:
- 10.1021/acsami.0c08652
-
http://dx.doi.org/10.1021/acsami.0c08652
- Author:
- Vieira, Sara S.; Paz, Gilvan M.; Araujo, Bárbara C.R.; Lago, Rochel M.; Sebastião, Rita C.O.
- Source:
- Thermochimica acta 2020 v.689 pp. 178628
- ISSN:
- 0040-6031
- Subject:
- magnesium oxide, etc ; absorption; carbon dioxide; kinetics; lithium silicates; models; phase transition; serpentinite; temperature; Show all 9 Subjects
- Abstract:
- ... In this work, it was studied the kinetics of CO₂ absorption process in the composite Li₄SiO₄/MgO at 400, 500, 600 and 700 °C. The composite Li₄SiO₄/MgO, prepared from a natural available mineral serpentinite Mg₃Si₂O₅(OH)₄ showed absorption capacity of ca. 24 wt.%. Based on the isothermal TG data, the CO₂ absorption kinetic was initially investigated using geometrical contraction models, diffusion ...
- DOI:
- 10.1016/j.tca.2020.178628
-
https://dx.doi.org/10.1016/j.tca.2020.178628
- Author:
- Tian, Qizhe; Ye, Junwei; Yuan, Wenjie; Zhang, Siqi; Shi, Lei; Zhong, Jianchu; Ning, Guiling
- Source:
- Powder technology 2020 v.371 pp. 130-141
- ISSN:
- 0032-5910
- Subject:
- magnesium oxide, etc ; Escherichia coli; Staphylococcus aureus; antibacterial properties; guidelines; lithium; microwave treatment; minimum inhibitory concentration; nanocrystals; Show all 9 Subjects
- Abstract:
- ... Nanocrystalline magnesium oxide with different lithium doping molar contents were prepared by a microwave-assisted hydrothermal route to improve their antibacterial activity. The as-prepared MgO and Li-doped MgO possess the co-existing structure of nanometer flakes and nanometer particles with the diameter ranged from 50 to 150 nm. The antibacterial effect of Li-doped MgO against Escherichia coli ...
- DOI:
- 10.1016/j.powtec.2020.05.031
-
https://dx.doi.org/10.1016/j.powtec.2020.05.031
- Author:
- Terakado, Nobuaki; Yoshimine, Toshikazu; Kozawa, Ryusei; Takahashi, Yoshihiro; Fujiwara, Takumi
- Source:
- RSC advances 2020 v.10 no.38 pp. 22352-22360
- ISSN:
- 2046-2069
- Subject:
- magnesium oxide, etc ; glass; glass transition; heat transfer; melting; nuclear magnetic resonance spectroscopy; polymers; thermal conductivity; Show all 8 Subjects
- Abstract:
- ... Oxide glass is an industrial material with advantages such as optical transparency and shaping ability of the melt, but at the same time, it is a bad conductor of heat due to its disordered structures. Therefore, heat dissipation in glass components often becomes a problem and its applications to the thermal management has been limited to use as a heat insulator. To break this mold and to apply it ...
- DOI:
- 10.1039/d0ra03026k
-
http://dx.doi.org/10.1039/d0ra03026k
- Author:
- Lu, Bing; Zhu, Weiping; Weng, Yiwei; Liu, Zhixin; Yang, En-Hua; Leong, Kah Fai; Tan, Ming Jen; Wong, Teck Neng; Qian, Shunzhi
- Source:
- Journal of cleaner production 2020 v.258 pp. 120671
- ISSN:
- 0959-6526
- Subject:
- magnesium oxide, etc ; Fourier transform infrared spectroscopy; automation; concrete; fly ash; rheology; slags; three-dimensional printing; viscosity; Show all 9 Subjects
- Abstract:
- ... 3D concrete printing technology greatly facilitates automation in construction which enhances efficiency, productivity and sustainability. This study develops a slag-based mixture as a cementless material for sustainable spray-based 3D printing. Effects of MgO and fly ash cenosphere (FAC) addition on setting, hydration and rheological properties of fresh mixtures are investigated to obtain the opt ...
- DOI:
- 10.1016/j.jclepro.2020.120671
-
https://dx.doi.org/10.1016/j.jclepro.2020.120671
- Author:
- Li, Congxin; Ni, Wei; Zang, Xiaogang; Wang, Huaizhi; Zhou, Yixiang; Yang, Zhiyu; Yan, Yi-Ming
- Source:
- Chemical communications 2020 v.56 no.45 pp. 6062-6065
- ISSN:
- 1364-548X
- Subject:
- magnesium oxide, etc ; adsorption; carbon; carbon dioxide; carbon monoxide; catalysts; chemical reactions; electrochemistry; electrolytes; Show all 9 Subjects
- Abstract:
- ... We report the synergistic adsorption and activation of CO₂ by using magnesium oxide anchored into a hollow carbon sphere (MgO/HCS) as an efficient catalyst for electrochemical reduction of CO₂ (ERC). The MgO/HCS catalyst exhibits a high selectivity for CO production with a faradaic efficiency of 81.7% at −1.0 V vs. RHE and a partial current density (PCD) of 16.7 mA cm⁻² in aqueous electrolyte. ...
- DOI:
- 10.1039/d0cc00929f
-
http://dx.doi.org/10.1039/d0cc00929f
- Author:
- Kameda, Tomohito; Yamamoto, Yusuke; Kumagai, Shogo; Yoshioka, Toshiaki
- Source:
- Applied water science 2020 v.10 no.5 pp. 104
- ISSN:
- 2190-5487
- Subject:
- magnesium oxide, etc ; absorbents; boron; fluorine; ions; landfill leachates; surface area; temperature; wastewater; wastewater treatment; Show all 10 Subjects
- Abstract:
- ... To realize improved wastewater treatment processes, the study investigated the processing of boron and fluorine and the processing of real landfill leachate using MgO with different specific surface areas. By optimizing the MgO absorbent, the time required for boron and fluorine processing can be reduced dramatically and uniform wastewater quality standards can be achieved. The rate constants for ...
- DOI:
- 10.1007/s13201-020-01198-z
-
http://dx.doi.org/10.1007/s13201-020-01198-z